Trayvon Martin followed proper procedure.

We teach our children about ' stranger danger'. The schools hold seminars with law enforcement professionals for our children, our most precious resource, to help them learn to keep themselves safe. Why are some people convinced that a young scared man, fighting for his life, should have not done what he was taught to do?
We tell our kids to be wary of strangers, and rightly so. Evade,hide, run, yell, and if all else fails, fight like your life depends on it. It just may.
This is what we teach them.
http://www.kidpower.org/library/article/safety-tips-kidnapping/
http://childparenting.about.com/od/healthsafety/a/Protecting-Against-Child-Predators-Beyond-Stranger-Danger_2.htm